Smartwatch

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A smartwatch is a portable wearable computer device in the form of a wristwatch. Most modern smartwatches are operated via a touchscreen, and are often reliant on mobile apps that run on a connected device such as a smartphone to provide some core functions.

Early smartwatches could perform basic tasks such as calculations, digital time telling, translations, and game-playing, while those released since 2015 have a more general functionality. They have similar features to smartphones such as the use of apps, a mobile operating system, wireless connectivity over Bluetooth or WiFi, or the ability to function as portable media players and FM radios. Some models have mobile cellular functionality such as making telephone calls.^[1][2][3]

While internal hardware varies, most have a backlit LCD or OLED electronic visual display^[4] and are usually powered by a rechargeable lithium-ion battery. They may also incorporate GPS receivers, digital cameras, microSD card readers, and various internal and environmental sensors such as thermometers, accelerometers, altimeters, barometers, gyroscopes, and ambient light sensors. Some include body sensors such as pedometers, heart rate monitors, galvanic skin response sensors, ECG sensors, and may double as activity trackers. Software may include maps, health and exercise related apps, calendars, and various watch faces.